柠檬酸-邻菲啰啉-稀土三元配合物的合成与表征

在无水乙醇溶液中,以邻菲啰啉(Phen)、柠檬酸(H3Cit)为配体,合成了7种稀土三元固体配合物.通过元素分析、摩尔电导率测定、红外光谱和热重差热分析等手段确定配合物的组成为RE(Cit)·Phen·2H2O(RE=La3+,Pr3+,Nd3+,Sm3+, Eu3+,Tb3+,Dy3+).     

稀土、苯氧乙酸、1,10-邻菲罗啉配合物的合成及抑菌

在乙醇水溶液中合成了六种苯氧乙酸(HPOA)-邻菲罗啉(Phen)-稀土三元固体配合物,采用元素分析,红外光谱,差热热重等测试方法进行表征,确定配合物的化学组成为RE(POA)3Phen(RE=La3+,Pr3+,Nd3+,Sm3+,Gd3+,Dy3+)。研究了稀土配合物的抑菌活性,结果表明稀土三元配合物的抑菌效果较单独的稀土氯化物、邻菲罗啉和苯氧乙酸好。     

柠檬酸-邻菲哕啉-稀土三元配合物的合成与表征

在无水乙醇溶液中,以邻菲哆啉（Phen）、柠檬酸（H3Cit）为配体,合成了7种稀土三元固体配合物。通过元素分析、摩尔电导率测定、红外光谱和热重差热分析等手段确定配合物的组成为RE（Cit）·Phen·2H2O（RE=La^3＋,Pr^3＋,Nd^3＋,Sm^3＋,Eu^3＋,Tb^3＋,Dy^3＋）。     

阿魏酸稀土配合物的合成及抗凝血性能研究

采用溶剂热法,以阿魏酸与稀土氯化物RECl3·6H2O(RE=Nd3+、Ce3+、Eu3+)为原料在乙醇溶液中合成阿魏酸稀土配合物.采用傅立叶红外光谱分析、紫外可见吸收光谱分析、差热—热重分析等对配合物进行了表征,推测其结构为(C10H9O4)3RE·3H2O.同时对配体阿魏酸及其配合物的抗凝血性能进行了比较,结果发现...     

稀土2-氨基-4,6-二甲基嘧啶配合物的合成、表征及其生物活性研究

以稀土氯化物、2-氨基-4,6-二甲基嘧啶为原料,制备了一类新型稀土配合物,通过元素分析、红外光谱、紫外光谱等手段对其进行了表征,确定了该配合物的化学组成:RE2(ADMP)(H2O)2Cl3(RE=La3+,Sm3+,Y3+,Er3+,ADMP=2-氨基-4,6-二甲基嘧啶)。抗菌实验结果表明,稀土配合物对大肠杆菌、金黄色葡萄球菌有较强的抑制作用,抗菌谱广。用MTT法对配合物使癌细胞凋亡能力做了初步研究,证明其具有使癌细胞凋亡的效果。     

铕(Ⅲ)-苯甲酰丙酮-邻菲啰啉配合物的合成及其荧光性质

为提高苯甲酰丙酮(BA)的Eu(Ⅲ)配合物的荧光强度,以邻菲啰啉(Phen)作为第2配体合成了三元混配配合物Eu(BA)3·Phen,并通过化学分析和元素分析确定了配合物的组成,通过FTIR谱对配合物进行了表征。荧光光谱数据表明,与相应的二元配合物Eu(BA)3·2H2O相比,Eu(BA)3·Phen的荧光强度提高了57%。     

镝(Ⅲ)-BDPPPD配合物的合成及其荧光性质

以二氧六环为溶剂 ,在 pH约为 7的条件下 ,分别以n (Dy3+ )∶n (BDPPPD) =2∶3和n (Dy3+ )∶n(BDPPPD)∶n(Phen ) =2∶3∶2的量比 (Phen为邻菲罗啉 ) ,合成了Dy(Ⅲ)的 1,5 双 (1′,3′ 二苯基 5′ 氧代吡唑 4′ 基 ) 1,5 戊二酮 (BDPPPD)的二元配合物Dy2 (BDPPPD) 3·6H2 O和三元配合物Dy2(BDPPPD) 3(Phen) 2 ·2H2 O ,收率为 91 2 %和 89 6 %。通过化学分析、元素分析和热分析确定了配合物的组成 ,通过FT -IR谱对配合物进行了表征。测定了配合物的荧光光谱 ,配合物的荧光发射峰位于 481和 5 76nm附近 ,分别相应于Dy3+ 的 4 F9/2 → 6H15/2 和 4 F9/2 → 6H13/2 跃迁 ,说明配合物发射Dy(Ⅲ)的特征荧光。第二配体Phen具有荧光增强作用 ,三元配合物Dy2 (BDPPPD) 3(Phen) 2 ·2H2 O最大发射峰 (5 76nm)的荧光强度是二元配合物Dy2 (BDPPPD) 3·6H2 O的 1 6 8倍。配合物具有较强荧光 ,说明BDPPPD的三重态能级与Dy3+ 最低激发态 (4 F9/2 )能级具有良好匹配 ,且其吸光系数较高 ,BDPPPD是Dy(Ⅲ)发光配合物的适宜配体     

N,N′,N″-三(3,5-二碘水杨醛)缩三氨基乙基胺及其稀土配合物的合成表征和抑菌活性

合成了三脚架型席夫碱配体N,N′,N″-三(3,5-二碘水杨醛)缩三氨基乙基胺( C27 H24 O3 N4 I6,L)及其稀土配合物.经元素分析、IR、TG-DTA和摩尔电导率的表征,确定配合物REL·H2O( RE=Tb3+、Nd3、La3+、Sm3)是1∶1型配位,总配位数为6.用荧光光谱法研究了席夫碱配合物与c...     

钐(Ⅲ)-1,3-二苯基-4-苯甲酰基-5-吡唑酮配合物的合成及其荧光性质

合成了钐（Ⅲ）的1，3－二苯基－4－苯甲酰基－5－吡唑酮（DPBZP）的二元配合物Sm(DPBZP)3.2H2O和三元配合物Sm(DPBZP)3.Phen(Phen为邻菲罗啉），通过化学分析和元素分析确定了配合物的组成，通过FT－IR谱对配合物进行了表征，配合物的荧光光谱表明，配合物发射Sm（Ⅲ）的特征荧光，1，3－二苯基－4－苯甲酰基－5－吡唑酮的三重态能级与Sm^3 最低激发态^4G5/2能级具有良好匹配；第二配体Phen具有荧光增强作用。     

重稀土2-噻吩甲酸配合物的合成及Tb3+的发光

合成了4种稀土与2-噻吩甲酸(L)配合物。通过元素分析、稀土配合滴定及摩尔电导确定其化学组成为REL3.2H2O(RE=Gd,Tb,Dy,Er),并对配合物进行了红外光谱、荧光激发和发射光谱测定。红外光谱测定表明,配体通过羧基以螯合双齿的方式与稀土离子(Ⅲ)配位成键。荧光光谱数据表明,铽配合物具有良好的荧光性能。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

我国聚碳酸酯工业发展概况

介绍我国聚碳酸酯生产能力和消费需求,对聚碳酸酯在信息工业中的应用作了简短介绍     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%.